Applying Custom Equation to SCT Livewire 5015 - Ford Powerstroke Diesel Forum
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Old 02-03-2014, 02:35 PM
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Applying Custom Equation to SCT Livewire 5015

I have been on a mission to install a Fuel Pressure Gauge on my LiveWire to make it the complete monitor.

I bought a 100 psi Fuel Transducer
Pressure Transducer or Sender 100 PSI Stainless Steel for Oil Fuel Air Water | eBay

GS-60ADAPTER Fuel Adapter fitting
Ford 6 0L Power Stroke Diesel Fuel Pressure Adapter GS 60ADAPTER | eBay

A 10' wire to allow plenty to run to Livewire (I can always cut it shorter)
Wire Harness for Pressure Transducer 10' 3 Meters Long UL Listed Wires | eBay

And last but not least an SCT Performance ISTX Analog Input Cable
SCT Performance Itsx Analog Cable for Ford Vehicles 4021 | eBay

I rigged up a test station using compressed air just to be sure it was interacting correctly with the LiveWire and sure enough pressure goes up and so does voltage being displayed...

Now the problem...... I spent all day on the phone with SCT trying to figure out how to apply a custom Equation to Analog Input 1 so that instead of seeing voltage I will see the correct PSI. The equation is (v*25)-12.5

I can enter in LiveLink Gen II under tools>Equations and create a datalog file and export it to the LiveWire and open the log file but it only wants to show me V or the Preinstalled Equations. Any ideas guy?

P.S. First Post. Sorry if it is in the wrong place. I have spent many many hours searching before posting.


************************************************** ************************************************** ***********
2007 F-250 6.0 / Blue Spring Kit/ SCT 5015 w/ EGT Probe and Fuel Pressure Adapter (maybe) / 2-1/2" RCD Leveling Kit w/Bilstein shocks / MOOG Ball Joints / Replacement OEM Oil Cooler / Sinister Coolant Filter

Last edited by jdbenedi; 02-03-2014 at 02:49 PM.
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Old 02-03-2014, 03:20 PM
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I think we figured out that entering custom equations only works for data logging at the moment.

However you can most likely use the preset equation for "gm 1 bar map" in the ts and it will give you the correct psi for that transducer
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Old 02-03-2014, 05:19 PM
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GM 1BAR MAP = (v*18.76)+10.345

Tranducer = (v*25)-12.5

@ 0 psi it puts out 0.5v = 0 psi vs. 19.725psi
@ 50 psi puts out 2.5v = 50 psi vs. 57.245psi
@ 80 psi puts out 3.7v = 80 psi vs 79.757 psi
@ 40 psi puts out 2.1v = 40 psi vs 49.741 psi
@ 35 psi puts out 1.9v = 35 psi vs 45.989 psi

as you can see it would be almost impossible at GM 1BAR MAP to tell when your fuel pump losing pressure. It might be close at 80 psi but at the bottom end it loses it...
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Old 02-03-2014, 05:25 PM
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Quote:
Originally Posted by portcity_gt View Post
I think we figured out that entering custom equations only works for data logging at the moment.

However you can most likely use the preset equation for "gm 1 bar map" in the ts and it will give you the correct psi for that transducer
^^^^ he is right. It is sad but true... you can only use a custom equation during data logging
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Old 02-03-2014, 05:50 PM
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Quote:
Originally Posted by jdbenedi View Post
GM 1BAR MAP = (v*18.76)+10.345

Tranducer = (v*25)-12.5

@ 0 psi it puts out 0.5v = 0 psi vs. 19.725psi
@ 50 psi puts out 2.5v = 50 psi vs. 57.245psi
@ 80 psi puts out 3.7v = 80 psi vs 79.757 psi
@ 40 psi puts out 2.1v = 40 psi vs 49.741 psi
@ 35 psi puts out 1.9v = 35 psi vs 45.989 psi

as you can see it would be almost impossible at GM 1BAR MAP to tell when your fuel pump losing pressure. It might be close at 80 psi but at the bottom end it loses it...
Ah, I honestly didnt check the link, I saw an ebay link and assumed you were using the same transducer as the rest of us.

Not too long ago my transducer started leaking so I spent 60 bucks on a good mechanical gauge and gave up on reading it with the ts for now.
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Old 02-03-2014, 06:56 PM
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Quote:
Originally Posted by portcity_gt View Post
Ah, I honestly didnt check the link, I saw an ebay link and assumed you were using the same transducer as the rest of us.

Not too long ago my transducer started leaking so I spent 60 bucks on a good mechanical gauge and gave up on reading it with the ts for now.
Oh no... could you provide a link to one that would work?
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Old 02-04-2014, 05:27 AM
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This is the one I was using.

http://api.viglink.com/api/click?for...r%20%7C%20eBay

also heres my thread from a while back if you havnt seen it. Some good info and some jibba jabba mixed in.


Anybody using the new live wire ts 5015 yet?
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fuel pressure sct, livewire, pressure gauge, sct, sct custom equations

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